What was found
IMMEDIATELY AFTER INITIATING TAKEOFF POWER AND ROLL (RUNWAY 24), AMS TOWER DIRECTED US TO ABORT TAKEOFF DUE TO AN UNEXPECTED GO-AROUND ON RUNWAY 18C. RECEIVED CAUTION FOR "BRAKE NR 5 RELEASED"; EXITED RUNWAY AND THEN RECEIVED ANOTHER CAUTION "GREEN HYDRAULIC SYSTEM LOW"; GREEN SYSTEM QUANTITY INDICATOR DISPLAYED LOW LEVEL AND CONTINUING TO DECREASE. BRAKES NR 5 AND NR 6 AND WHEEL NR 5 WERE REPLACED AND THE GREEN HYDRAULIC WAS SERVICED AND CHECKS OK.